Description: 540 organic compounds -- part of the class 532-570 series / 540 organic compounds -- part of the class 532-570 series/() organic compounds (class 532, subclass 1) (1) heterocyclic carbon compounds containing a hetero ring having chalcogen (i.e., oxygen, sulfur, selenium or tellurium) or nitrogen as the only ring hetero atoms (121) azaporphyrins (122) phthalocyanines (136) halogen bonded directly to ring carbon of the phthalocyanine ring system (138) processes of halogenating the phthalocyanine ring system
Hierarchy/Derived subclasses
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Patent Apps in 540/138
Granted Patents in 540/138
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